Malicious PDF — malware analysis report

Static analysis result for SHA-256 958cd0b30da694ec…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 09:23:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4c603893d782b116f80421f0c813cf6 SHA-1: 19f9a9d6782aced4ab2fe6d6fce479b658cba416 SHA-256: 958cd0b30da694ec97bfc3e3e97c9ca12acc1923a19412d17fe780f50caf3dd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, masquerading as a 'free generator / game hack' for Roblox. The document body and embedded links suggest a lure to trick users into downloading potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/april-fools-roblox-hack-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-robux-redeem-code_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-slaying-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/can-i-download-roblox-for-ps3-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/where-to-get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-be-a-hacker-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3176 22384 bytes
SHA-256: c8518bed262c195d962ca2b17dfb4cf3e0968354c0f897d3405093576a46954e
font_01_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 19116 bytes
SHA-256: 363fd737e710cb709711f1341b3765fe6f082740f6788f4f5b3093fc046f2f9c

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